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javascript实现图片轮换动作方法
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图片轮换是一种相当复杂的技术，早些年基本用flash实现。这里有一个链接，教大家如何用flash实现它的。之所以用flash，是因为flash是基于帧的，这与图片轮换的原理相当接近。为了模拟帧的效果，我们要用到overflow把多余的部分遮罩掉，也就是flash中常说的遮罩层。在Flash中，连时间轴都是可视的，而我们则全凭想象力与数学来计算现在是到了哪一张图。加之，flash有Robert Penner大神的缓动公式，那实在太耀眼，直到script.aculo.us类库搞出自己的缓动公式，才扭转局面。

我们来看一看图片轮换的结构层。它应该包含框体，图片展示区，图片滑动层与分页栏。原谅我制造这么多词汇，因为没有个名词讲解就难以为继了，前人也没有做这样的总结，个个都不愿意分享一下。框体就是一个div元素，作用有两个：提供相册的边框与作为分页栏的包含块。如果不清楚什么叫包含块（containing block）的话，自己查阅CSS权威指南吧。接着下来图片展示区与图片滑动层，也就是我实现新式无缝滚动的那一种结构，一个很干净的无序列表，所有难点都转移到设置它的CSS上。至于图片展示区就是ul元素，大小为一张图片的大小；图片滑动层就是那个li元素，也只有一个li元素而已，利用CSS强制把它里面的图片不换行向左浮动，并设置li元素一个很大很大的宽度，好让它一行容纳所有图片。分页栏就是一个包含许多链接的span元素，和普通的水平菜单差不多，只不过要用绝对定位它安置到框体的右下角。

<div id="album">
 <ul>
 <li>
  <a href="http://www.cnblogs.com/rubylouvre" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="index1">
  <img alt="月光下的花瓣" src="/UploadFiles/2021-04-02/o_s001.jpg">





#album {
 position:relative;/*为分页栏准备的*/
 width:400px;/*必须设置，为分页栏准备*/
 height:300px;/*必须设置，为分页栏准备*/
 border:10px solid #8080C0;
}
#album ul ,#album li {/*消除默认样式*/
 padding:0;
 margin:0;
 list-style:none;
}
#album ul{
 position:relative; /*为图片滑动区*/
 height:300px;/*必须设置，用于隐藏图片滑动区多余的部分*/
 width:400px;/*必须设置，用于隐藏图片滑动区多余的部分*/
 overflow:hidden;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s001.jpg) no-repeat 0 0;
}
#album li { /*图片滑动区*/
 position:absolute;
 width:1000%;/*让里面的所有图片并列显示*/
}
#album a {
 float:left;
}
#album img {
 display:block;
 border:0;
}
#album span {/*分页栏*/
 position:absolute;
 right:0;
 bottom:10px;
}
#album span a{
 display:block;/*让其拥有盒子模型*/
 margin-right:10px;/*错开格子*/
 width:15px;/*呈正方形*/
 height:15px;
 line-height:15px;
 text-align:center;/*居中显示*/
 text-decoration:none;/*消除下划线*/
 color:#808080;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_button.gif) no-repeat -15px 0;
}
#album span a:hover ,#album span a.hover{
 color:#F8F8F8;
 background-position:0 0;
}








 
<!doctype html>
<title>javascript图片轮换 by 司徒正美</title>
<meta charset="utf-8"/>
<meta name="keywords" content="javascript图片轮换 by 司徒正美" />
<meta name="description" content="javascript图片轮换 by 司徒正美" />
<style type="text/css">
 #album {
 position:relative;/*为分页栏准备的*/
 width:400px;/*必须设置，为分页栏准备*/
 height:300px;/*必须设置，为分页栏准备*/
 border:10px solid #8080C0;
 }
 #album ul ,#album li {/*消除默认样式*/
 padding:0;
 margin:0;
 list-style:none;
 }
 #album ul{
 position:relative; /*为图片滑动区*/
 height:300px;/*必须设置，用于隐藏图片滑动区多余的部分*/
 width:400px;/*必须设置，用于隐藏图片滑动区多余的部分*/
 overflow:hidden;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s001.jpg) no-repeat 0 0;
 }
 #album li { /*图片滑动区*/
 position:absolute;
 width:1000%;/*让里面的所有图片并列显示*/
 }
 #album a {
 float:left;
 }
 #album img {
 display:block;
 border:0;
 }
 #album span {/*分页栏*/
 position:absolute;
 right:0;
 bottom:10px;
 }
 #album span a{
 display:block;/*让其拥有盒子模型*/
 margin-right:10px;/*错开格子*/
 width:15px;/*呈正方形*/
 height:15px;
 line-height:15px;
 text-align:center;/*居中显示*/
 text-decoration:none;/*消除下划线*/
 color:#808080;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_button.gif) no-repeat -15px 0;
 }
 #album span a:hover ,#album span a.hover{
 color:#F8F8F8;
 background-position:0 0;
 }
</style>
<h4>javascript图片轮换 by 司徒正美</h4>
<div id="album">
 <ul>
 <li>
  <a href="http://www.cnblogs.com/rubylouvre" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="index1">
  <img alt="月光下的花瓣" src="/UploadFiles/2021-04-02/o_s001.jpg">


这个和我以前的系列一样，不用JS也可以点击实现切换。不过以前是用锚点来改变scrollTop的值，现在是改变scrollLeft的值。


如果不使用缓动效果，很简单。





var Rotate = function(id){
 try{document.execCommand("BackgroundImageCache", false, true);}catch(e){};
 var container = document.getElementById(id),
 slide = container.getElementsByTagName("li")[0];
 slide.innerHTML += slide.innerHTML;
 var item = slide.getElementsByTagName("a"),
 critical = item[item.length/2].offsetLeft,//临界值
 distance = critical/(item.length/2),
 delta = - distance;
 (function(){//实现自动轮换图片
 setTimeout(function(){
  delta = delta - distance;
  if(delta < -critical){
  delta = - distance;
  }
  slide.style.left = delta + "px";//★★★★★★★★
  setTimeout(arguments.callee,1500)
 },1500)
 })()
}





要使用缓动，就要动用我的缓动公式与transition函数，在星号的位置中调用。





 
<!doctype html>
<title>javascript图片轮换 by 司徒正美</title>
<meta charset="utf-8"/>
<meta name="keywords" content="javascript图片轮换 by 司徒正美" />
<meta name="description" content="javascript图片轮换 by 司徒正美" />
<style type="text/css">
 #album {
 position:relative;
 width:400px;
 height:300px;
 border:10px solid #8080C0;
 }

 #album ul,#album li {
 list-style:none;
 margin:0;
 padding:0;
 }

 #album ul {
 position:relative;
 height:300px;
 width:400px;
 overflow:hidden;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s001.jpg) no-repeat 0 0;
 }

 #album li {
 position:absolute;
 width:1000%;
 }

 #album a {
 float:left;
 }

 #album img {
 display:block;
 border:0;
 }

 #album span {
 position:absolute;
 right:0;
 bottom:10px;
 }

 #album span a {
 display:block;
 margin-right:10px;
 width:15px;
 height:15px;
 line-height:15px;
 text-align:center;
 text-decoration:none;
 color:gray;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_button.gif) no-repeat -15px 0;
 }

 #album span a:hover,#album span a.hover {
 color:#F8F8F8;
 background-position:0 0;
 }
</style>
<script type="text/javascript">
 var spring= function(pos) {
 return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6));
 }
 var transition = function(el){
 var options = arguments[1] || {},
 begin = options.begin,//开始位置
 change = options.change,//变化量
 duration = options.duration || 500,//缓动效果持续时间
 ftp = options.ftp || 50,
 onEnd = options.onEnd || function(){},
 ease = options.ease,//要使用的缓动公式
 end = begin + change,//结束位置
 startTime = new Date().getTime();//开始执行的时间
 (function(){
  setTimeout(function(){
  var newTime = new Date().getTime(),//当前帧开始的时间
  timestamp = newTime - startTime,//逝去时间
  delta = ease(timestamp / duration);
  el.style.left = Math.ceil(begin + delta * change) + "px"
  if(duration <= timestamp){
   el.style.left = end + "px";
   onEnd();
  }else{
   setTimeout(arguments.callee,1000/ftp);
  }
  },1000/ftp)
 })()
 }
 var Rotate = function(id){
 try{document.execCommand("BackgroundImageCache", false, true);}catch(e){};
 var container = document.getElementById(id),
 slide = container.getElementsByTagName("li")[0],
 paginater = container.getElementsByTagName("span")[0],
 links = paginater.getElementsByTagName("a"),
 length = links.length, aBefore = length, aIndex;
 slide.innerHTML += slide.innerHTML;
 var item = slide.getElementsByTagName("a"),
 critical = item[length].offsetLeft,//临界值
 distance = critical/length,
 delta = - distance;
 (function(){//实现自动轮换图片
  setTimeout(function(){
  delta = delta - distance;
  if(delta < -critical){
   delta = - distance;
  }
  aIndex = - delta/distance;
  links[aBefore-1].className = "";
  links[aIndex-1].className = "hover";
  aBefore = aIndex;
  transition(slide,{begin:delta,change:distance,ease:spring})
  setTimeout(arguments.callee,1500)
  },1500)
 })()
 }
 window.onload = function(){
 Rotate("album");
 }
</script>
<h4>javascript图片轮换 by 司徒正美</h4>
<div id="album">
 <ul>
 <li>
  <a href="http://www.cnblogs.com/rubylouvre" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="index1">
  <img alt="月光下的花瓣" src="/UploadFiles/2021-04-02/o_s001.jpg">


我们也可以像第一部分那样加入一个信息栏，这样程序就拥有三个定时器了，看起来让人有点头晕，现实中不提倡这样做，这里只是试范一下如何使用transition的回调函数罢了。





//动态生成li元素并把它插入到DOM树中。
var tip = document.createElement("li");//信息栏
tip.style.cssText = "position:absolute;bottom:0;width:400px;height:40px;line-height:40px;text-indent:2em;";
slide.parentNode.appendChild(tip);
if(!+"\v1"){
 tip.style.cssText += "color:#369;background:#fff;filter:alpha(opacity=50)";
}else{
 tip.style.cssText += "color:#fff;background: rgba(164, 173, 183, .65);";
}









 
<!doctype html>
<title>javascript图片轮换 by 司徒正美</title>
<meta charset="utf-8"/>
<meta name="keywords" content="javascript图片轮换 by 司徒正美" />
<meta name="description" content="javascript图片轮换 by 司徒正美" />
<style type="text/css">
 #album {
 position:relative;
 width:400px;
 height:300px;
 border:10px solid #8080C0;
 }

 #album ul,#album li {
 list-style:none;
 margin:0;
 padding:0;
 }

 #album ul {
 position:relative;
 height:300px;
 width:400px;
 overflow:hidden;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s001.jpg) no-repeat 0 0;
 }

 #album li {
 position:absolute;
 width:1000%;
 }

 #album a {
 float:left;
 }

 #album img {
 display:block;
 border:0;
 }

 #album span {
 position:absolute;
 right:0;
 bottom:10px;
 }

 #album span a {
 display:block;
 margin-right:10px;
 width:15px;
 height:15px;
 line-height:15px;
 text-align:center;
 text-decoration:none;
 color:gray;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_button.gif) no-repeat -15px 0;
 }

 #album span a:hover,#album span a.hover {
 color:#F8F8F8;
 background-position:0 0;
 }
</style>
<script type="text/javascript">
 var easeInOutCubic= function(pos){
 if ((pos/=0.5) < 1) return 0.5*Math.pow(pos,3);
 return 0.5 * (Math.pow((pos-2),3) + 2);
 }

 var transition = function(el){
 var options = arguments[1] || {},
 begin = options.begin,//开始位置
 change = options.change,//变化量
 duration = options.duration || 500,//缓动效果持续时间
 ftp = options.ftp || 50,
 onEnd = options.onEnd || function(){},
 ease = options.ease,//要使用的缓动公式
 end = begin + change,//结束位置
 startTime = new Date().getTime();//开始执行的时间
 (function(){
  setTimeout(function(){
  var newTime = new Date().getTime(),//当前帧开始的时间
  timestamp = newTime - startTime,//逝去时间
  delta = ease(timestamp / duration);
  el.style.left = Math.ceil(begin + delta * change) + "px"
  if(duration <= timestamp){
   el.style.left = end + "px";
   onEnd();
  }else{
   setTimeout(arguments.callee,1000/ftp);
  }
  },1000/ftp)
 })()
 }
 var Rotate = function(id){
 try{document.execCommand("BackgroundImageCache", false, true);}catch(e){};
 var container = document.getElementById(id),
 slide = container.getElementsByTagName("li")[0],
 paginater = container.getElementsByTagName("span")[0],
 links = paginater.getElementsByTagName("a"),
 images = slide.getElementsByTagName("img"),
 length = links.length, aBefore = length, aIndex;
 slide.innerHTML += slide.innerHTML;
 var tip = document.createElement("li");
 tip.style.cssText = "position:absolute;bottom:-40px;height:20px;width:380px;padding:10px;color:#fff;background:#fff;";
 slide.parentNode.appendChild(tip);
 if(!+"\v1"){
  tip.style.color = "#369";
  tip.style.filter = "alpha(opacity=67)"
 }else{
  tip.style.cssText += "background: rgba(164, 173, 183, .65);"
 }
 var item = slide.getElementsByTagName("a"),
 critical = item[length].offsetLeft,//临界值
 distance = critical/length,
 delta = - distance;
 (function(){//实现自动轮换图片
  setTimeout(function(){
  delta = delta - distance;
  if(delta < -critical){
   delta = - distance;
  }
  aIndex = - delta/distance;
  tip.innerHTML = images[aIndex-1].getAttribute("alt");
  tip.style.bottom = "-40px";
  links[aBefore-1].className = "";
  links[aIndex-1].className = "hover";
  aBefore = aIndex;
  transition(slide,{begin:delta,change:distance,ease:easeInOutCubic,onEnd:function(){
   move(tip);
  }})
  setTimeout(arguments.callee,2000)
  },2000)
 })()
 }
 var move = function(el){
 var begin = parseFloat(el.style.bottom),speed = 1;
 el.bottom = begin;
 (function(){
  setTimeout(function(){
  el.style.bottom = el.bottom + speed + "px";//移动
  el.bottom += speed;
  speed *= 1.5;//下一次移动的距离
  if(el.bottom >= 0){
   el.style.bottom = "0px";
  }else{
   setTimeout(arguments.callee,25);//每移动一次停留25毫秒
  }
  },25)
 })()
 }
 window.onload = function(){
 Rotate("album");
 }
</script>
<h4>javascript图片轮换 by 司徒正美</h4>
<div id="album">
 <ul>
 <li>
  <a href="http://www.cnblogs.com/rubylouvre" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="index1">
  <img alt="月光下的花瓣" src="/UploadFiles/2021-04-02/o_s001.jpg">


最后为信息栏上的按钮绑定点击事件就行了。





 
<!doctype html>
<title>javascript图片轮换 by 司徒正美</title>
<meta charset="utf-8"/>
<meta name="keywords" content="javascript图片轮换 by 司徒正美" />
<meta name="description" content="javascript图片轮换 by 司徒正美" />
<style type="text/css">
 #album {
 position:relative;
 width:400px;
 height:300px;
 border:10px solid #8080C0;
 }

 #album ul,#album li {
 list-style:none;
 margin:0;
 padding:0;
 }

 #album ul {
 position:relative;
 height:300px;
 width:400px;
 overflow:hidden;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s001.jpg) no-repeat 0 0;
 }

 #album li {
 position:absolute;
 width:1000%;
 }

 #album a {
 float:left;
 }

 #album img {
 display:block;
 border:0;
 }

 #album span {
 position:absolute;
 right:0;
 bottom:10px;
 }

 #album span a {
 display:block;
 margin-right:10px;
 width:15px;
 height:15px;
 line-height:15px;
 text-align:center;
 text-decoration:none;
 color:gray;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_button.gif) no-repeat -15px 0;
 }

 #album span a:hover,#album span a.hover {
 color:#F8F8F8;
 background-position:0 0;
 }
</style>
<script type="text/javascript">
 var easeInOutCubic= function(pos){
 if ((pos/=0.5) < 1) return 0.5*Math.pow(pos,3);
 return 0.5 * (Math.pow((pos-2),3) + 2);
 }

 var transition = function(el){
 var options = arguments[1] || {},
 begin = options.begin,//开始位置
 change = options.change,//变化量
 duration = options.duration || 500,//缓动效果持续时间
 ftp = options.ftp || 50,
 onEnd = options.onEnd || function(){},
 ease = options.ease,//要使用的缓动公式
 end = begin + change,//结束位置
 startTime = new Date().getTime();//开始执行的时间
 (function(){
  setTimeout(function(){
  var newTime = new Date().getTime(),//当前帧开始的时间
  timestamp = newTime - startTime,//逝去时间
  delta = ease(timestamp / duration);
  el.style.left = Math.ceil(begin + delta * change) + "px"
  if(duration <= timestamp){
   el.style.left = end + "px";
   onEnd();
  }else{
   setTimeout(arguments.callee,1000/ftp);
  }
  },1000/ftp)
 })()
 }
 var Rotate = function(id){
 try{document.execCommand("BackgroundImageCache", false, true);}catch(e){};
 var container = document.getElementById(id),
 slide = container.getElementsByTagName("li")[0],
 paginater = container.getElementsByTagName("span")[0],
 links = paginater.getElementsByTagName("a"),
 images = slide.getElementsByTagName("img"),
 length = links.length, aBefore = length, aIndex = 1;
 slide.innerHTML += slide.innerHTML;
 var tip = document.createElement("li");//信息栏
 tip.style.cssText = "position:absolute;bottom:0;width:400px;height:40px;line-height:40px;text-indent:2em;";
 slide.parentNode.appendChild(tip);
 if(!+"\v1"){
  tip.style.cssText += "color:#369;background:#fff;filter:alpha(opacity=50)";
 }else{
  tip.style.cssText += "color:#fff;background: rgba(164, 173, 183, .65);";
 }
 var item = slide.getElementsByTagName("a"),
 critical = item[length].offsetLeft,//临界值
 distance = critical/length,
 delta = - distance;
 paginater.onclick = function(e){//实现手动切换
  e = e || window.event;
  var target = e.srcElement "a"){//事件代理
  var _aIndex = aIndex;
  aIndex = target.getAttribute("href").slice(-1);
   !+"\v1" "alt");//改变信息栏的文字
  links[aBefore-1].className = "";//改变按钮的样式
  links[aIndex-1].className = "hover";//改变按钮的样式
  aBefore = aIndex;
  aIndex++;
  transition(slide,{begin:delta,change:distance,ease:easeInOutCubic})
  setTimeout(arguments.callee,2000)
  },2000)
 })()
 }
 window.onload = function(){
 Rotate("album");
 }
</script>
<h4>javascript图片轮换 by 司徒正美</h4>
<div id="album">
 <ul>
 <li>
  <a href="http://www.cnblogs.com/rubylouvre" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="index1">
  <img alt="月光下的花瓣" src="/UploadFiles/2021-04-02/o_s001.jpg">


有的人很懒，不喜欢点击，想在按钮上一掠而过也能看到效果。这简单，我们把绑定函数独立出来，分别绑定到onclick事件与onmouseover事件上就行了。现在我们换一个缓动公式，反正这东西多着呢。比如这个pulse，像蛇信子一样来回多次振动（默认5次，有第二个参数可以自己调，我调到10次），非常有意思。你们可以试试一下子掠过所有按钮，效果是何等的炫目！





 
<!doctype html>
<title>javascript图片轮换 by 司徒正美</title>
<meta charset="utf-8"/>
<meta name="keywords" content="javascript图片轮换 by 司徒正美" />
<meta name="description" content="javascript图片轮换 by 司徒正美" />
<style type="text/css">
 #album {
 position:relative;
 width:400px;
 height:300px;
 border:10px solid #F2F1D7;
 }

 #album ul,#album li {
 list-style:none;
 margin:0;
 padding:0;
 }

 #album ul {
 position:relative;
 height:300px;
 width:400px;
 overflow:hidden;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_s001.jpg) no-repeat 0 0;
 }

 #album li {
 position:absolute;
 width:1000%;
 }

 #album a {
 float:left;
 }

 #album img {
 display:block;
 border:0;
 }

 #album span {
 position:absolute;
 right:0;
 bottom:10px;
 }

 #album span a {
 display:block;
 margin-right:10px;
 width:15px;
 height:15px;
 line-height:15px;
 text-align:center;
 text-decoration:none;
 color:gray;
 background:transparent url(http://images.cnblogs.com/cnblogs_com/rubylouvre/199042/o_button.gif) no-repeat -15px 0;
 }

 #album span a:hover,#album span a.hover {
 color:#F8F8F8;
 background-position:0 0;
 }
</style>
<script type="text/javascript">
 var pulse = function(pos, pulses) {
 return (-Math.cos((pos*((pulses||5)-.5)*2)*Math.PI)/2) + .5;
 }

 var transition = function(el){
 var options = arguments[1] || {},
 begin = options.begin,//开始位置
 change = options.change,//变化量
 duration = options.duration || 500,//缓动效果持续时间
 ftp = options.ftp || 50,
 onEnd = options.onEnd || function(){},
 ease = options.ease,//要使用的缓动公式
 end = begin + change,//结束位置
 startTime = new Date().getTime();//开始执行的时间
 (function(){
  setTimeout(function(){
  var newTime = new Date().getTime(),//当前帧开始的时间
  timestamp = newTime - startTime,//逝去时间
  delta = ease(timestamp / duration,10);
  el.style.left = Math.ceil(begin + delta * change) + "px"
  if(duration <= timestamp){
   el.style.left = end + "px";
   onEnd();
  }else{
   setTimeout(arguments.callee,1000/ftp);
  }
  },1000/ftp)
 })()
 }
 var Rotate = function(id){
 try{document.execCommand("BackgroundImageCache", false, true);}catch(e){};
 var container = document.getElementById(id),
 slide = container.getElementsByTagName("li")[0],
 paginater = container.getElementsByTagName("span")[0],
 links = paginater.getElementsByTagName("a"),
 images = slide.getElementsByTagName("img"),
 length = links.length, aBefore = length, aIndex = 1;
 slide.innerHTML += slide.innerHTML;
 var tip = document.createElement("li");//信息栏
 tip.style.cssText = "position:absolute;bottom:0;width:400px;height:40px;line-height:40px;text-indent:2em;";
 slide.parentNode.appendChild(tip);
 if(!+"\v1"){
  tip.style.cssText += "color:#369;background:#fff;filter:alpha(opacity=50)";
 }else{
  tip.style.cssText += "color:#fff;background: rgba(164, 173, 183, .65);";
 }
 var item = slide.getElementsByTagName("a"),
 critical = item[length].offsetLeft,//临界值
 distance = critical/length,
 delta = - distance;
 var manualSlippage = function(){
  var e = arguments[0] || window.event;
  var target = e.srcElement "a"){//事件代理
  var _aIndex = aIndex;
  aIndex = target.getAttribute("href").slice(-1);
   !+"\v1" "alt");//改变信息栏的文字
  links[aBefore-1].className = "";//改变按钮的样式
  links[aIndex-1].className = "hover";//改变按钮的样式
  aBefore = aIndex;
  aIndex++;
  transition(slide,{begin:delta,change:distance,ease:pulse})
  setTimeout(arguments.callee,2000)
  },2000)
 })()
 }
 window.onload = function(){
 Rotate("album");
 }
</script>
<h4>javascript图片轮换 by 司徒正美</h4>
<div id="album">
 <ul>
 <li>
  <a href="http://www.cnblogs.com/rubylouvre" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" id="index1">
  <img alt="月光下的花瓣" src="/UploadFiles/2021-04-02/o_s001.jpg">


                                

                                

                                     

                                

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